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How to initialize private static members in C++?
...le: foo.cpp
int foo::i = 0;
If the initialization is in the header file then each file that includes the header file will have a definition of the static member. Thus during the link phase you will get linker errors as the code to initialize the variable will be defined in multiple source files.
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What's the best way to set a single pixel in an HTML5 canvas?
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One method that hasnt been mentioned is using getImageData and then putImageData.
This method is good for when you want to draw a lot in one go, fast.
http://next.plnkr.co/edit/mfNyalsAR2MWkccr
var canvas = document.getElementById('canvas');
var ctx = canvas.getContext('2d');
var ...
What is the most accurate way to retrieve a user's correct IP address in PHP?
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Even then however, getting a user's real IP address is going to be unreliable. All they need to do is use an anonymous proxy server (one that doesn't honor the headers for http_x_forwarded_for, http_forwarded, etc) and all you get...
“document.getElementByClass is not a function”
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You probably meant document.getElementsByClassName() (and then grabbing the first item off the resulting node list):
var stopMusicExt = document.getElementsByClassName("stopButton")[0];
stopButton.onclick = function() {
var ta = document.getElementsByClassName("stopButton")[0]...
Best way to determine user's locale within browser
...alue in the string, eg.:
var acceptLanguage= 'en-gb,en;q=0.7,de;q=0.3';
then you could include a <script src> pointing at that external service in the HTML, and use JavaScript to parse the language header. I don't know of any existing library code to do this, though, since Accept-Language p...
How do I reset the scale/zoom of a web app on an orientation change on the iPhone?
When I start my app in portrait mode, it works fine. Then I rotate into landscape and it's scaled up. To get it to scale correctly for the landscape mode I have to double tap on something twice, first to zoom all the way in (the normal double tap behavior) and again to zoom all the way out (again, ...
What does it mean to inflate a view from an xml file?
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if inflate = rendering, then what is the use of onDraw(), precisely ?
– PypeBros
Jul 19 '12 at 9:44
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javac error: Class names are only accepted if annotation processing is explicitly requested
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I was stumped by this too because I was including the .Java extension ... then I noticed the capital J.
This will also cause the "annotation processing" error:
javac myclass.Java
Instead, it should be:
javac myclass.java
...
eval command in Bash and its typical uses
...ue of the variable or the output from the command into separate words) and then treats each word as a wildcard pattern. For example:
$ ls
file1 file2 otherfile
$ set -- 'f* *'
$ echo "$1"
f* *
$ echo $1
file1 file2 file1 file2 otherfile
$ n=1
$ eval echo \${$n}
file1 file2 file1 file2 otherfile
$ev...
ORA-12514 TNS:listener does not currently know of service requested in connect descriptor
... = DEDICATED)
(SERVICE_NAME = *<servicenamefromDB>*)
)
)
then I ran:
sqlplus user@TEST
Success!
The listener is basically telling you that whatever service_name you are using isn't a valid service according to the DB.
(*I was running sqlplus from Win7 client workstation to re...